Local computer networks and the principles of their construction
Local computer networks usually organizewithin the limits of one enterprise. Usually they are subscribers located at a short distance. This distance is usually considered to be about 10-15 km. Installation of local computer networks is carried out with the purpose of solving the tasks of the enterprise, which consist in the need for the general storage of data, the concentration of data, their processing, the provision of universal access for network users, and the exchange of information and data within the network (including processed data).
Such networks are characterized by separate processingdata. This is expressed in the fact that the user sends a request to the server and waits for a response. The server, in turn, stores the necessary information, processes the received request and returns the already processed data to the user. Local computer networks are often built on such principles, they are also conventionally called "server-client".
There are peer-to-peer networks and multi-which have a special server. Local computer networks with a peer-to-peer build system are characterized by the absence of a server, and all computers perform the role of both the client and the server. This scheme is fully operational and can be used in small offices. Dvuhranovye local computer networks are formed using a separate server and the rest of the mass of computers, the data of which must necessarily be registered on the server.
Modern systems are characterized by a mixed type of construction. This means that some of the subscribers are combined into a peer-to-peer structure, and the other part are participants in the two-guard structure.
Communication channels between subscribers form nodes, witha drawing similar to a tire can be obtained by drawing them. Such a system has its own peculiarity. The computer can receive data continuously, but it can only be transmitted when the bus channel is free. At the time of data transfer, each participant checks whether the information is addressed to it, and accepts it, if it is the addressee.
There is a slightly different way of constructing.Conditionally it is called a star. Schematically, this system is a server that is connected in parallel to the mass of computers. Servicing of local computer networks of this kind is much more expensive than in the first version. But any problem can be found and eliminated in the shortest time, and the process of entering or removing from the network of any devices is not accompanied by any inconvenience.
The bandwidth of the "star" is quite high andis limited only by the power characteristics of certain nodes. The data in such networks do not collide and do not interfere with each other. Currently, combined construction technologies are often used. They are also called hybrid. This allows you to minimize the cost of networking and get rid of the drawbacks of basic building solutions. Regardless of how the computers are connected on the production network, remember the security of the data and take care of the necessary encryption protocols.